In this paper, analytical procedure for amino acids in sedimentary rocks is described and the data obtained in the preliminary experiments are presented. The method consists of the desalting of the hydrolysis liquor using ion-exchange resin, and the identification and quantitative estimation of the individual amino acids using the technique of paper partition chromatography. The results performed by this procedure are shown in Table 2 and Plate 1.

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After the disappearance of paleo-Komoro lake which was filled up by the Pliocene Komoro group, a new lake basin was formed, and the older Josho lake sediment was deposited in it. After an interval of erosin stage, the younger Josho lake sediment was settled in the same basin. These Pleistocene formations are named the Josho lake-deposit as a whole. The relation between the older and the younger Josho formations is an unconformity. Their rock facies are different between the southern part and the eastern part. Especially the strata in the eastern part are rich in conglomerate, whereas those of the southern part consist mainly of mudstone. Judging from the fact that the sandy pumice in the younger volcanic ash formation overlies conformably on them everywhere, it is suppose that the Josho lake-deposit is contemporaneous in both areas irrespective of the difference in rock facies. The geologic age of the older Josho formation is correlated with the early Tama age, while that of the upper part of the younger Josho formation corresponds with the early Musashino age, though its main part is correlative with the age of Shimosueyoshi loam. The younger Josho formation is also supposed to have been formed during Wurm glacial age through the examination of mammal fossils in it. The center of these older and younger Josho formations lies in the Shioda basin in the southern part of the whole lake basin. They are not suppossed to be the lakes which were formed through the dam-up effect of the pyroclastic flow. The uplift of the surrounding mountains and the corresponding subsidence of the lower lands may be one of the main factors of the formation of these lakes.

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It has often been said that the metamorphic rocks and so-called non-metamorphic greenrocks of the Tanzawa mountainland were separated each other by some tectonic events. The present auther carried out some field and microscopic observations on the problem in the northern district of the Mountainland. The metamorphic rocks consist mainly of hornfels and partly of schistose rocks which is thermally metamorphosed. The original rocks of the meta-morphics are composed of fine-grained intermediate pyroclastics with some argilaceous rocks. On the contrary, so-called non-metamorphic greenrocks mainly consist of coarse-grained basic pyroclastics. The two systems discord each other and the boundary gently dips to the north. Along the boundary, sheared zones or dolerite dikes are necessarily distributed. As to the effect of the thermal metamorphism, it was found that in so-called non-metamorphic greenrocks, some metamorphic minerals such as green biotite which are thought to be caused by contact effect occur. Shistose rocks, on the other hand, were clearly separated from the so-called non-metamorphic greenrocks. Furthermore, the intrusive boundary of the plutonic rock cuts across the schistosity plane with high angles. The present auther suggests the possibility that the schistose rocks had been formed before the deposition of so-called non-metamorphic green rocks.

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Palaeozoic eugeosynclinal belt of the South-West Japan is divided into several geological units. These units are also distinguished by quantities of Mn and Cu-deposits, moreover, by contents of Fe and Mn in Mn-ores. These specialization in existence of ore deposits may be expression of sedimentation rate in the geosyncline. Namely, Cu-deposits are formed in the higher rate, Mn-deposits in the lower rate and Mn-Cu-deposits in the intermediate rate of sedimentation respectively.

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